Sado Domain

The Sado Domain was a feudal domain of the Tokugawa Shogunate that reigned over Sado Island off the northern coast of Central Honshu.

History
The island of Sado, north of (and part of) Niigata Prefecture, was directly ruled by the Tokugawa Shogunate since the aftermath of the Battle of Sekigahara, in which they confiscated Uesugi lands and took over Sado Island for themselves. It was a large source of revenue as a gold mine, and the island was ruled as a feudal domain during the shogunate.

During the Boshin War, the Honma clan ruled Sado, and backed the Tokugawa shoguns.